Issue #614 has been updated by ko1 (Koichi Sasada). Target version changed from 2.0.0 to next minor Discussion was stopped. ---------------------------------------- Feature #614: instance_method(ancestor) https://bugs.ruby-lang.org/issues/614#change-31623 Author: trans (Thomas Sawyer) Status: Assigned Priority: Normal Assignee: matz (Yukihiro Matsumoto) Category: core Target version: next minor =begin Currently Module#instance_methods takes a single argument, true or false, as to whether to include all ancestor's methods. However sometimes limiting the search at a particular ancestor is helpful. Currently this requires code along the lines of: meths = [] FooClass.ancestors[0..FooClass.ancestors.index(FooAncestor)].each do |anc| meths = meths | anc.instance_methods(false) end But it would be nice if we could simply use: instance_methods(FooAncestor) This change is, practically-speaking, backward compatible, since 'true' can be the same as 'Kernel', encompassing the entire ancestry. This change is applicable to the entire family of "methods" methods, including Kernel#methods. This change also helps eliminate the widely disliked true|false arguments. The particular use case that brought this to mind was trying to write a Module#conflict? method that lists the methods two modules or classes have in common, but excluding the methods that they share from a common ancestor. =end -- http://bugs.ruby-lang.org/